Bellows

bel′lōz, or bel′lus, n.pl. an instrument for producing a current of air so as to blow up a fire, either in a kitchen, a furnace, or a forge—or for producing the current of air by which the pipes and reeds of an organ are sounded: ( fig. ) that which fans the fire of hatred, jealousy, .: the lungs. [Same as Belly (q.v.); now used only in pl. , the sing. not having survived the 15th century.]